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Population Demography of Northern Spotted Owls

Population Demography of Northern Spotted Owls: Published for the Cooper Ornithological Society

Eric D. Forsman
Robert G. Anthony
Katie M. Dugger
Elizabeth M. Glenn
Alan B. Franklin
Gary C. White
Carl J. Schwarz
Kenneth P. Burnham
David R. Anderson
James D. Nichols
James E. Hines
Joseph B. Lint
Raymond J. Davis
Steven H. Ackers
Lawrence S. Andrews
Brian L. Biswell
Peter C. Carlson
Lowell V. Diller
Scott A. Gremel
Dale R. Herter
J. Mark Higley
Robert B. Horn
Janice A. Reid
Jeremy Rockweit
James P. Schaberl
Thomas J. Snetsinger
Stan G. Sovern
Copyright Date: 2011
Edition: 1
Pages: 120
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  • Book Info
    Population Demography of Northern Spotted Owls
    Book Description:

    The Northern Spotted Owl, a threatened species that occurs in coniferous forests in the western United States, has become a well-known environmental symbol. But how is the owl actually faring? This book contains the results of a long-term effort by a large group of leading researchers to document population trends of the Northern Spotted Owl. The study was conducted on 11 areas in the Pacific Northwest from 1985 to 2008, and its objectives were both to evaluate population trends and to assess relationships between reproductive rates and recruitment of owls and covariates such as weather, habitat, and the invasion of a closely related species, the Barred Owl. Among other findings, the study shows that fecundity was declining in five populations, stable in three, and increasing in three areas. Annual apparent survival rates of adults were declining in 10 out of 11 areas. This broad, synthetic work provides the most complete and up-to-date picture of the population status of this inconspicuous forest owl, which is at the center of the complex and often volatile debate regarding the management of forest lands in the western United States.

    eISBN: 978-0-520-95059-7
    Subjects: Zoology

Table of Contents

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  1. Front Matter
    (pp. i-iv)
  2. Table of Contents
    (pp. v-vi)
    (pp. vii-x)
    (pp. xi-xii)
  5. Population Demography of Northern Spotted Owls
    (pp. 1-78)

    During the last 40 years, the management philosophy on federal forest lands in the United States has undergone profound changes as government agencies have become increasingly aware of the importance of federal lands in species conservation. Nowhere has this change been more controversial than in the Pacific Northwest (Washington, Oregon, and northern California), where attempts to maintain viable populations of Northern Spotted Owls (Strix occidentalis caurina), Marbled Murrelets (Brachyramphus marmoratus), red tree voles (Arborimus longicaudus), and other plants and animals that thrive in old forests have resulted in large reductions in harvest of old forests on federal lands (Ervin 1989,...

  6. Appendices
    (pp. 79-90)
    (pp. 91-98)
  8. INDEX
    (pp. 99-104)
    (pp. 105-106)